Rose Byrne has a not so secret weapon: those striking, shapely eyebrows, which can communicate contempt, amusement, calculation, innocence, insecurity, terror—all in an instant.

They're a key part of the 33 year old Aussie actress's Swiss Army knife–like utility.

Since first catching our attention as Natalie Portman's handmaiden more than a decade ago in Star Wars: Episode II—Attack of the Clones, she's appeared in everything from zombie flicks (28 Weeks Later) to sword and sandals epics (Troy) to comic-book adaptations (X Men: First Class) to R-rated comedy blockbusters (Bridesmaids).